Thermodynamics Question (Gas Cycles and Vapor Cycles) So I just finished learnin

Question

Thermodynamics Question (Gas Cycles and Vapor Cycles)

So I just finished learning about all the big gas cycles and am now moving onto vapor cycles.

I'm a little confused on the differences(or the benefits of using vapor cycles instead).

What I know so far is that vapor cyles have the working fluid undergo a phase change mid process while the gas cycles stay in the same gaseous phase for the entire process.

Why are vapor cycles used instead of gas cycles for something like power generation? Is the thermal effeciency higher?  

Explanation / Answer

There are many reasons for this

The efficiency of vapour cycle is more than that of a gas cycle

For producing the same amount of effect or output in the gas cycle, large volume of gas is required; hence the systems tend to become very large, bulky and expensive, which are not affordable for the domestic applications.

Hence the main reason is that thermal efficiency is high for vapour power cycles

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